Update 06-taosdump.md

docs/en/19-tools/06-taosdump.md

@@ -17,7 +17,7 @@ Users should not use taosdump to back up raw data, environment settings, hardwar
 
 ## Installation
 
-Download [taosTools](https://tdengine.com/assets-download/cloud/taosTools-2.1.3-Linux-x64.tar.gz).
+To use taosdump, you need to download and install [taosTools](https://tdengine.com/assets-download/cloud/taosTools-2.1.3-Linux-x64.tar.gz). Before installing taosTools, please firstly download and install [TDengine CLI](../cli/#installation).
 
 Decompress the package and install.
 ```